Grinding machine



1947. -R. L. BAZLEY 2 GRINDING MACHINE Filed on. 5,1944 v 3 Sheets-Sheet1 M INVENTOR- ATTORNEY Aug 1; i947. R}. a... BAZLEY 2,425,982

GRINDING MACHINE Filed Oct. 5, 1944 l 3 sheets-sheet 2 l rl L L a J 4INVEN TOR. 35 55 11 Lb'azz flTTORNEY v Patented Aug. 19, 1947 2,425,982GRINDING MACHINE Ralph L. Bazley, Jackson Heights, N. Y., assignor toSquare D Company, Detroit, Mich, a corporation of Michigan ApplicationOctober 5, 1944, Serial No. 557,264)

'7 Claims.

This invention relates to a grinding machine for grinding arcuateprofiles on workpieces.

An object of the invention is to provide a grinding machine with meansfor associating a workpiece with the grinding wheel, rotating theworkpiece about a desired center, and reciproeating the workpiece acrossthe face of the wheel as it is being rotated.

Another object of the invention is to provide a grinding machine with aworkpiece support mounted for rotation about a pivot with means foreffecting reciprocation of said support as the work is rotated.

Other objects and features of the invention will be readil apparent tothose skilled in the art from the specification and appended drawingillustrating certain preferred embodiments in which:

Figure 1 is a side elevati'onal view of the grinding machine accordingto the present invention.

Figure 2 is a front elevational view of the grinding machine.

Figure 3 is a partial top plan view of the grinding machine.

I Figure 4 is a partial vertical sectional view through the grindingmachine.

Figure 5 is a sectional view on line V--V of Figure 4.

Figure 6 is a View similar to Figure 5, but with the work manipulatingmeans in another position.

Figure 7 is a view similar to Figure 5, but with the view manipulatingmeans in one limiting position of movement.

Figure 8 is a plan view of a workpiece which may be formed in themachine.

Figure}? is a side elevational view of the workpiece of Figure 8.

The grinding machine as illustrated in the drawings comprises a table Iupon which is supported a motor 2 and a grinding wheel 3 driven therebythrough a gearing system, not shown but contained in the gear housing 4.The housing 4 supports a bracket 5 havin a pair of side wings 6 in whichis pivotally supported a platform 1. Upon the platform 1 is mounted away 8 with which cooperates a slide 9. An adjusting screw H is threadedinto the way 8 and has a double collar engagement with the slide 9 asshown more particularly in Figure 4. On the slide 9 is mounted a way l2with which is assodated a transverse slide I3 Upon the slide i3 issupported an arcuate guiding and retaining plate ['4 having a notchedperiphery at [5 providing an overhanging portion within which is 2disposed the notched complementary end of a plate 16 attached to theunder surface of a work holder ll. Through the plate M and the slide isis a bushing it within which is rotatably mounted a pivot pin l9 keyedat its upper end to the work holder il The way I2 has a cutout portion21 in which is disposed a link 22 keyed to the lower end of the pivotpin 9. The opposite end of the link 22 is keyed to a pin 23 reciprocalwithin a slot 2 in the slide 9. The link 22 is freely movable within thecutout portion 2| between the slides 9 and it.

In the upper portion of the work holder H are provided seats 25 for theworkpiece 25. For holding the workpiece 28 against the seats 25 there isprovided locking means formed by a lever 2i carrying an adjustable workengaging stud 28 and pivoted on the work holder I! at 29. For lockingthe lever 2? in place, there is provided a manually operable lever 3ipivoted on the work holder at 32 and having a pin 33 for engaging andholding the lever 21 in its locking position.

Extending from the housing A is a platform 3*! carrying trunnions 35within which is pivoted a shaft 35 having an operatin crank 31 andcarrying a cam 38 engaging an adjustable follower 39 on the platform I.The platform I has an integral upwardly extending arm All carrying anadjustable stop 42 engaging with the head of stud 43 in the bracket 5.The slide I3 is provided with extensions 34 at its opposite sidescarrying adjustable stops 45 limiting the extreme positions of the Workholder ll.

In the operation of the grinding machine according to the presentinvention, the parts are in an inoperative, work inserting and removing,position as shown in Figure 1. The workpiece is placed upon the seats 25and locked in position by manipulation of the lever 3|. The crank 3'! isthen manipulated to rotate the platform I and the parts supportedthereon into their horizontal position as shown in Figure 4. This iseffected through engagement of the cam 38 with the follower 39 to effectcounterclockwise rotation of the platform '5 until the stop 2 engagesthe head of stud G3. Thereafter, the profile is placed upon theworkpiece by moving the work holder I? through the desired angularmovement.

In Figures 8 and 9, the workpiece illustrated is an optical prism andthe machine is utilized to form the arcuate profiles at the oppositeends of the prism. The full lines of Figure 8 represent the finishedproduct and the dotted lines the initial blank upon which the operationis performed. The radius of the arcuate profile is determined byadjustment of the slide 9 by means of adjusting screw II to move thecenter of rotation determined by the axis of pin 19 toward and away fromthe grinding wheel 3.

An important feature of applicant's invention lies in the provision oftransverse movement of the workpiece as it is being rotated with respectto the grinding wheel. This is effected through the operation of thelink 22, pin 23 and slot 24. As the work holder [1 is rotated about theaxis of the pin IS, the link 22 rotates therewith. However, the pin 23is mounted on the link 22 and movement of the pin 23 is limited to' arectilinear one by the slot 24. Accordingly, as pin [9 rotates it mustmove in a transverse direction as the pin 23 moves within the slot. Thistransverse movement is effected by transverse movement of the slide [3with respect to the way [2. The transverse movement of the pin l9 whichwill carry the work holder and work therewith is indicated in Figures 5,6 and 7 in which as the work holder I! is rotated, as indicated by thearrows in a counterclockwise direction, the pin 23 will move toward theleft and effect a movement of the pivot pin l9 downwardly as viewed inthese figures, such movement being accompanied by movement bodily of theslide I3 and the parts supported thereon. This trans verse movement ofthe work as it is rotated with respect to the grinding wheel spreads thegrinding operation over a large surface and avoid the formation of agroove within the wheel which would destroy its life and accuracy.

The adjustable stops 45 determine the angular movement of work holder H.In the present instance, they are located to provide for 180 rotation ofthe workpiece to form the desired profile of the workpiece as shown inFigure 8.

While certain preferred embodiments of the invention have beenspecifically disclosed, it is understood that the invention is notlimited thereto, as many variations will be readily apparent to thoseskilled in the art and the invention is to be given its broadestpossible interpretation within the terms of the following claims.

What is claimed is:

1. In a machine for grinding an arcuate profile upon a workpiece, agrinding wheel having a radial, planar, grinding face, means forrotating said grinding wheel about an axis perpendicular to saidgrinding face, a slide movable parallel to said grinding face, a holderfor the workpiece mounted on said slide for rotation about an axis atright angles to the direction of movement of the slide and parallel tothe plane of said grinding face and spaced therefrom by the dimension ofthe radius of the desired arcuate profile, and means connected to saidworkholder for effecting reciprocation of the slide as an incident tothe rotation of the workholder about its pivotal axis.

2. In a machine for grinding an arcuate profile upon a workpiece, agrinding wheel having a radial, planar, grinding face, means forrotating said grinding wheel about an axis perpendicular to saidgrinding face, a slide movable parallel to said grinding face, a holderfor the workpiece mounted on said slide for rotation about an axis atright angles to the direction of movement of the slide and parallel tothe plane of said grinding face and spaced therefrom by the dimension ofthe radius of the desired arcuate profile, means connected to saidworkholder for effecting reciprocation of the slide as an incident tothe rotation of the workholder about its pivotal axis, a second slidemounted for movement perpendicular to the plane of the said grindingface, means for mounting said first-mentioned slide on said secondslide, and means for effecting adjusting movement of said second slideto locate said workholder pivotal axis at the desired distance from theplane of the grinding face.

3. In a machine for grinding an arcuate profile upon a workpiece, agrinding wheel having a radial, planar, grinding face, means forrotating said grinding Wheel about an axis perpendicular to saidgrinding face, a slide movable parallel to said grinding face, a holderfor the workpiece mounted on said slide for rotation about an axis atright angles to the direction of movement of the slide and parallel tothe plane of said grinding face and spaced therefrom by the dimension ofthe radius of the desired arcuate profile, means connected to saidworkholder for effecting reciprocation of the slide as an incident tothe rotation of the workholder about its pivotal axis, a second slidemounted for movement perpendicular to the plane of the said grindingface, means for mounting said first-mentioned slide on said secondslide, means for effecting adjusting movement of said second slide tolocate said workholder pivotal axis at the desired distance from theplane of the grinding face, and means for moving said slides and holderbodily out of association with said grinding wheel to facilitate theinsertion and removal of the workpiece.

4. In a machine for grinding an arcuate profile upon a workpiece, agrinding wheel having a radial, planar, grinding face, means forrotating said wheel about an axis perpendicular to the plane of saidgrinding face, a supporting platform adjacent to said wheel, a slide onsaid platform movable parallel to said grinding face, a pivot pinjournaled in said slide with its axis parallel to the plane of thegrinding face, a workholder mounted on said pin for rotary movementrelative to the slide about the axis of the pin, a part relativelystationary in the normal operation of the machine and having a slottherein disposed with its longitudinal axis transverse to the directionof movement of said slide, a guide pin in said slot, and a linkinterconnecting said pivot and guide pins to effect rotation of theguide pin about the axis of the pivot pin as the workholder is rotatedwhereby rotation of said workholder about the axis of said pivot pin isaccompanied by movement of the slide and workholder bodily in adirection parallel to the plane of the grinding face.

5. In a machine for grinding an arcuate profile upon a workpiece, agrinding wheel having a radial, planar, grinding face, means forrotating said wheel about an axis perpendicular to the plane of saidgrinding face, a platform adjacent to said grinding wheel, a slide onsaid platform adjustable toward and away from the plane of said grindingface, a second slide on said firstmentioned slide movable parallel tothe plane of the grinding face, a workholder pivotally mounted on saidsecond slide for rotation about an axis at right angles to the directionof movement of the second slide and parallel to the plane of thegrinding face, adjustment of said first-mentioned slide locating theaxis of rotation of the workholder spaced from the plane of saidgrinding face by the dimension of the radius of the desired arcuateprofile, and means connected to said workholder for effectingreciprocation of said second slide parallel to the plane of the grindingface as an incident to the rotation of the workholder about its pivotalaxis.

6. In a machine for grinding an arcuate profile upon a workpiece, agrinding wheel having a radial, planar, grinding face, means forrotating said Wheel about an axis perpendicular to the plane of saidgrinding face, a platform adjacent to said grinding wheel, a slide onsaid platform adjustable toward and away from the plane of said grindingface, a second slide on said firstmentioned slide movable parallel tothe plane of the grinding face, a workholder pivotally mountd on saidsecond slide for rotation about an axis at right angles to the directionof movement of the second slide and parallel to the plane of thegrinding face, adjustment of said first-mentioned slide locating theaxis of rotation of the workholder spaced from the plane of saidgrinding face by the dimension of the radius of the desired arcuateprofile, means connected to said Workholder for effecting reciprocationof said second slide parallel to the plane of the grinding face as anincident to the rotation of the workholder about its pivotal axis, andmeans for bodily moving said platform to move the workpiece into and outof operative grinding relation with the grinding face.

7. In a machine for grinding an arcuate profile upon a workpiece, agrinding Wheel having a radial, planar, grinding face, means forrotating said wheel about an axis perpendicular to the plane of saidgrinding face, a platform adjacent to said grinding wheel, a slide onsaid platform adjustable toward and away from the plane of said grindingface, a second slide on said firstmentioned slide movable parallel tothe plane of the grinding face, a workholder pivotally mounted on saidsecond slide for rotation about an axis parallel to the plane of thegrinding face, adjustment of said first-mentioned slide locating theaxis of rotation of the workholder spaced from the plane of saidgrinding face by the dimension of the radius of the desired arcuateprofile, means connected to said workholder for effecting reciprocationof said second slide .parallel to the plane of the grinding face as anincident to the rotation of the workholder about its pivotal axis, meanspivotally mounting said platform, and a manually manipulable cam foreffecting movement of said platform about its pivotal mounting to movethe workpiece into and out of grinding relation with said grinding face.

RALPH L. BAZLEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

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